Abstract: Many advanced signal receiving devices include more than one tuner. An apparatus is described that includes a first circuit operating as a first portion of a signal attenuator, a second circuit operating as a second portion of the signal attenuator and outputting a first differential output signal, and a third circuit also operating as the second portion of the signal attenuator and outputting a second differential output signal. A method is described including receiving a signal, splitting the received signal to produce a first output signal and a second output signal, the splitting being performed using a differential signal format and further being performed using only at least one of a resistor, capacitor, and inductor, and outputting the first output signal in a differential signal format and the second output signal in a differential signal format.

Abstract: Many advanced signal receiving devices include more than one tuner. An apparatus is described that includes a first circuit operating as a first portion of a signal attenuator, a second circuit operating as a second portion of the signal attenuator and outputting a first differential output signal, and a third circuit also operating as the second portion of the signal attenuator and outputting a second differential output signal. A method is described including receiving a signal, splitting the received signal to produce a first output signal and a second output signal, the splitting being performed using a differential signal format and further being performed using only at least one of a resistor, capacitor, and inductor, and outputting the first output signal in a differential signal format and the second output signal in a differential signal format.

Abstract: A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.

Abstract: A method and apparatus for demodulating different type of signals having at least a portion of overlapping frequency ranges is provided. The method and apparatus receives at least one a broadcast signal and a home networking signal, wherein the frequency range of the broadcast signal overlaps the frequency range of the home networking signal. The system further determines if the received signal is a broadcast signal or a home networking signal and provides the respective signal to a demodulator for demodulation.

Abstract: A method and apparatus for demodulating different type of signals having at least a portion of overlapping frequency ranges is provided. The method and apparatus receives at least one a broadcast signal and a home networking signal, wherein the frequency range of the broadcast signal overlaps the frequency range of the home networking signal. The system further determines if the received signal is a broadcast signal or a home networking signal and provides the respective signal to a demodulator for demodulation.

Abstract: A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.

Abstract: The method and apparatus according to the present invention teaches a way to employ a pair of inexpensive switch IC's by improving isolation using a tuned diode shunt on the potential leakage path that exists between the two inputs when the IRD is in the legacy LNB Mode. In particular, the present invention teaches a method and apparatus of providing a signal path between a first input and a second signal processor. The second signal processor can further be coupled to a second input. When the second processor is coupled to the second input, the signal path is decoupled from the second processor and coupled to ground using a pin diode.

Abstract: The disclosed embodiments relate to a system that processes a received signal. An exemplary embodiment of the system comprises a receiver circuit that is adapted to receive the received signal and separate an out-of-band data signal corresponding to an out-of-band frequency spectrum from the received signal, an analog-to-digital (A/D) converter that converts the out-of-band data signal to a digitized out-of-band frequency spectrum signal, and a circuit that is adapted to identify data corresponding to an out-of-band data channel within the digitized out-of-band frequency spectrum signal.

Abstract: A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.

Abstract: A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.

Abstract: An apparatus (100) for isolating a noise intolerant device (110) from a source of noise includes a digital bus (104/105). A processor (101) outputs clock signals and first data signals and receives second data signals over the digital bus (104/105). A bi-directional buffer (109) is coupled between the digital bus (104/105) and the noise intolerant device (110) disposed in a tuner module. The apparatus (100) operates such that, in dependence upon a control signal, the bi-directional buffer (109) selectively passes the clock signals and the first data signals from the digital bus (104/105) to the noise intolerant device (110), and the second data signals from the noise intolerant device (110) to the digital bus (104/105).

Abstract: An apparatus (100) for isolating a noise intolerant device (110) from a source of noise includes a digital bus (104/105). A processor (101) outputs clock signals and first data signals and receives second data signals over the digital bus (104/105). A bi-directional buffer (109) is coupled between the digital bus (104/105) and the noise intolerant device (110) disposed in a tuner module. The apparatus (100) operates such that, in dependence upon a control signal, the bi-directional buffer (109) selectively passes the clock signals and the first data signals from the digital bus (104/105) to the noise intolerant device (110), and the second data signals from the noise intolerant device (110) to the digital bus (104/105).

Abstract: A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information includes an input analog-to-digital converter (19) for producing a digital datastream. A symbol timing recovery and segment sync recovery network (24; FIG. 3, 4) develops a properly timed sampling clock for the digital converter (19). The symbol timing recovery network (310) responds to an output from the segment sync recovery network (328), which in turn responds to an equalized signal from an adaptive channel equalizer (34). A controlled oscillator (336) generates the sampling clock for the digital converter. A control network (340, 344, 348; FIG. 3) shifts the frequency range of the oscillator to maintain desired linear operation to enhance symbol timing acquisition.